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CellVoice 4: Specifications

CellVoice 4 Back Panel
The CellVoice 4 offers a low-cost way to effectively monitor your smaller sites. This compact RTU offers cellular voice dial-out and DTMF for convenient alarm notifications and acknowledgement in the field.

Full Specifications
Cellular Notification Options: CDMA or GSM
Protocols: SNMPv1, DCPx, TELNET, HTTP (Web), SMTP (Email)
Discrete Inputs: Up to 4
Analog Temperature Sensors: 1 Internal, support for 1 external analog sensor probe
Analog Accuracy: +/- 1% of actual value
Control Relays: 1 Optional Form C Relay

1 RJ45 10BaseT Ethernet port
1 DB9 rear-panel craft port
1 1/8 stereo connector for external temperature probe
1 RJ11 Telco phone jack
Up to 4 alarm input connectors (2 inputs per alarm)
1 Relay output connector (NO, NC, CO)
1 Push button switch

Visual Interface:

8 Firmware-controlled LEDs (Includes LED for each alarm input)
1 Hardware-controlled LED
2 LAN connector hardware LEDs

Dimensions: 1.72"H x 8.13"W x 7.15"D
(4.37 cm x 20.64 cm x 18.15 cm)
Weight: 1 lb. 5 oz.
Mounting: 19" or 23" rack (19" and 23" extended ears available
or single-side mount)
Power Input: +24VDC via 110VAC wall transformer (6.3V-34VDC), -48VDC
3 Choices of Power Connector: Standard RIA Connector,
barrel connector, and WAGO for positive locking
Current Draw: 100mA @ 24VDC
Fuse: Resettable, internal fuse
Operating Temperature: 32-140 F (0-60 C)
Operating Humidity: 0%-95% noncondensing
RoHS 5 Approved Yes

Ordering Options

NetGuardian LT Back Panel
The CellVoice 4 offers a low-cost way of effectively monitoring smaller sites. This compact RTU offers voice dial-out and DTMF for convenient alarm notifications and acknowledgement in the field..

Ordering Options
Wireless Connection: GSM or CDMA
Discrete Points: 1, 2, or 4
Control Relay: 0 or 1
External Temperature Sensor: Fits Stereo Plug Temp Sensor, part D-PR-998-10A-07
Power Options:
  • -48VDC
  • +24VDC via 110 VAC wall transformer

Trap Relay LT   Trap Relay LT

This new RTU is a hardware variant of the CellVoice 4. The Trap Relay LT does not have the cellular data modem, but it can process SNMP Traps.

SMS Receiver

SMS Receiver

Forward alarms from your wireless RTU to your T/Mon or SNMP Master via SMS notifications. With the SMS Receiver, you can bypass the traditional hassles of cellular alarm reporting by sending SMS alarm notifications from your RTU to your SNMP master.

Discrete Sensors

Discrete Sensors

Battery power, temperature, and water levels are just some of things you need to monitor to keep your network up and running. Track changing network conditions with these discrete sensors.

Temperature Sensor with Probe

Temperature Sensor with Probe

Temperature sensor that plugs into the external temp sensor jack option for the NetGuardian LT. Part#: D-PR-998-10A-07


SMS reporting directly to your mobile phone.
The SMS reporting option for the CellVoice 4 RTU allows you to report alarms via SMS directly to your phone.

Wireless reporting to the NOC in a single step.
You can also report alarms wirelessly via CDMA/GSM directly to your alarm management system with the SMS Receiver. The SMS Receiver forwards incoming SMS alarm messages as SNMP traps to your alarm master. This saves you the trouble of paying for a third party cellular data provider. You also won't be punching a hole in your firewall to receive alarms from your cellular devices.